Making a small water powered generator is quite an
easy task. The parts are shown below and include a propeller (which can
be homemade) and a cheap electrical motor (3 to 6v). The motor is held
in a piece of wood shape to form a handle.

A multimeter is set to read volts and connected using crocodile clips to
the positive and negative probes.

Spinning the propeller by hand is normally enough to produce 0.3 to 0.6
volts. This can clearly be seen on the multimeter.

If the homemade wind generator is placed in a flowing stream, it will
start to generate a small amount of electricity

Try connecting the water powered generator to a bulb holder. If enough
electricity is created the bulb should light. This is best seen at
night.
Alternatively, connect it to an LED as this may require less electricity
to shine brightly. The correct name for water powered generator is a
‘turbine’. Turbines are used in dams to produce electricity from the
power of moving water - as water is released from the lake behind the
dam.

QUESTIONS:1. Build the water powered generator
as shown above and test it. How many volts are produced ?2. In order to light a 3 volt LED,
how many generators will need to be connected together - to produce
enough electrical current ?